Shopping for lenses in Singapore

My wife is going to be in Singapore in a couple of weeks time and I was considering getting her to pick up a 16-45 while she's there - if it can be had considerably cheaper than uk prices.

It's a few years since I've been to Singapore (I used to live in Hong Kong and visited there on business) so I've no idea where to go for cheap kit now. Can anyone help me out?

Cheers
Steve